10th Digit of VIN Chart: What It Means and How to Read It

Every vehicle sold in the United States — and most vehicles worldwide — carries a 17-character Vehicle Identification Number (VIN). Each position in that number carries specific information about the vehicle. The 10th digit is one of the most useful: it tells you the model year.

Why the 10th Digit Matters

When you're buying a used vehicle, pulling an insurance quote, registering a car, or checking a recall, you'll often be asked for the model year. The 10th digit of the VIN gives you that answer directly — no paperwork required. It's especially helpful when a seller's claim about a vehicle's year doesn't match what you see, or when a title or registration document is unavailable.

The National Highway Traffic Safety Administration (NHTSA) standardized the 17-digit VIN format in 1981. Before that, manufacturers used inconsistent systems. That's why VIN decoding — including the 10th digit — only applies reliably to vehicles manufactured in 1981 or later.

The 10th Digit of VIN Chart 📋

The 10th digit cycles through a specific sequence of letters and numbers. To avoid confusion, the letters I, O, and Q are never used in any VIN position — they look too much like 1, 0, and 0.

The sequence restarts every 30 years, which is why B appears for both 1981 and 2011, and A appears for both 2010 and — eventually — 2040. For most practical purposes, the difference between a 30-year-old vehicle and a current one is obvious, but if you're ever unsure, cross-reference with other digits in the VIN.

Model Year vs. Calendar Year: An Important Distinction

Model year and calendar year are not the same thing. Manufacturers often begin producing the next model year's vehicles in the summer or fall of the current calendar year. A vehicle with a 10th digit of S (2025 model year) might have rolled off the assembly line in mid-2024.

This distinction matters for:

• Registration and titling — states title and register vehicles by model year, not build date
• Insurance rates — insurers use model year when calculating premiums
• Recalls and TSBs — technical service bulletins and recall notices are issued by model year
• Emissions and safety standards — compliance requirements are tied to model year

Where to Find the VIN

Before you can read the 10th digit, you need to locate the VIN itself. Common locations include:

• Dashboard (driver's side) — visible through the windshield at the base of the windshield frame
• Driver's side door jamb — on a sticker or stamped plate
• Vehicle title and registration documents
• Insurance cards
• Engine block — stamped directly on the metal

All 17 digits should match across locations. Discrepancies between the dashboard VIN and the door jamb VIN can signal tampering and are worth investigating before any purchase or title transfer.

How This Applies to DMV and Registration Processes 🚗

State DMV offices rely heavily on VIN data when processing titles and registrations. When you register a vehicle, the model year encoded in the 10th digit is what determines:

• Which emissions testing requirements apply (rules vary significantly by state)
• Whether the vehicle qualifies for certain registration exemptions (older vehicles are sometimes exempt from inspections in some states)
• How registration fees are calculated — many states factor in model year and vehicle age

Because these rules vary by state, the 10th digit is a starting point, not a final answer. What a model year means for your registration costs or inspection requirements depends entirely on where you live.

When the 10th Digit Alone Isn't Enough

The 10th digit tells you the model year — nothing more. If you need to know the make, model, engine type, trim level, manufacturing plant, or production sequence, you'll need to read or decode the full VIN.

Free VIN decoding tools are available through NHTSA's official website, which can break down all 17 positions. For title, registration, or recall purposes, your state DMV and the NHTSA recall database are the authoritative sources.

Your vehicle's model year is one data point. How that year interacts with your state's rules, your vehicle's category, and your specific registration situation is where the real variation lives.